Ruler



FIG. 1 is a top plan view of a ruler showing my new design;

FIG. 2 is a front elevational view;

FIG. 3 is a rear elevational view;

FIG. 4 is a bottom plan view;

FIG. 5 is a right side elevational view;

FIG. 6 is another right side elevational view, with the upper housing tilted towards the rear;

FIG. 7 is another right side elevational view, with the upper housing tilted towards the front;

FIG. 8 is a left side elevational view;

FIG. 9 is another left side elevational view, with the upper housing tilted towards the front; and

FIG. 10 is another left side elevational view thereof, with the upper housing tilted towards the rear. 

The ornamental design for a ruler, as shown and described. 